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'[AVR]: Using ATtiny26 with STK500'
2002\10\09@173632 by Russell McMahon

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I'm about to attempt using the ATtiny26L with the STK500 programmer.
The Studio software mentions the processor but I don't think any of the
provided sockets support the 26L pinout (yet to check in detail).
Presumably using the ISP cable will work OK.

Has anyone got useful comments to make about the 26L in this context or
otherwise?

Software examples specific to the 26L are also rare at this stage. Any A2D
experiences using the gain stage and differential mode would be of interest.
I'm interested in using the serial hardware to provide UART functionality
which of course requires a small amount of software to achieve the
functionality of a "normal" hardware UART (eg no buffering requires response
within 1 bit time). I will be implementing a full duplex UART with enough
interrupt driven software to make it look like a normal UART to other
software. This looks like a simple enough task but if anyone's done this
already any code would be appreciated.


       Russell McMahon

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2002\10\09@220815 by Katinka Mills

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Hi Russell,

> -----Original Message-----
> From: pic microcontroller discussion list
> [spam_OUTPICLISTTakeThisOuTspamMITVMA.MIT.EDU]On Behalf Of Russell McMahon
> Sent: Thursday, 10 October 2002 06:35
> To: .....PICLISTKILLspamspam@spam@MITVMA.MIT.EDU
> Subject: [AVR]: Using ATtiny26 with STK500
>
>
> I'm about to attempt using the ATtiny26L with the STK500 programmer.
> The Studio software mentions the processor but I don't think any of the
> provided sockets support the 26L pinout (yet to check in detail).
> Presumably using the ISP cable will work OK.

Yes I have done this successfully (I too wish they had a socket for the T26
on the STK 500 :o( ) The ISP cable will still work well :o)


> Has anyone got useful comments to make about the 26L in this context or
> otherwise?
>
> Software examples specific to the 26L are also rare at this stage. Any A2D
> experiences using the gain stage and differential mode would be
> of interest.

The A2D works on this chip like most of the others, it is identical (apart
from more inputs and diff stages ) to the T15 :o) no real gotchas here :o)

Not used the TWI interface yet as all my T26 designs talk to a M128 via 2
wire bitbang. So I can not comment on this yet, although one day I will play
with it as the T26 is a great little chip and will be come another work
horse :o)


Regards,


Kat.

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2002\10\09@230102 by Russell McMahon

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> > I'm about to attempt using the ATtiny26L with the STK500 programmer.
> > The Studio software mentions the processor but I don't think any of the
> > provided sockets support the 26L pinout (yet to check in detail).
> > Presumably using the ISP cable will work OK.

> Yes I have done this successfully (I too wish they had a socket for the
T26
> on the STK 500 :o( ) The ISP cable will still work well :o)

Katinka,

I am using the ?blue 20 pin socket which has the correct pinout for a 26.
All programming lines except Reset seem correct. The Reset line does not go
to the programming header but can be picked up on a 4 pin options header.

How did/do you connect Reset?
Connecting Reset to ground (which is where it should be during programming)
produces apparently OK handshake but does not produce a correct verify.
Connecting uP-Reset to Reset from the programming header causes failure of
programming.

Do you need a clock connected to X1 during programming or verify?. Datasheet
is unclear (ie says you may or may not depending on fuses - doesn't seem to
say what the default is.)

I can connect a clock line from elsewhere on board but would be nice to know
what others have got to work. Also disturbing that connection to socket
onboard from reset line is not complete even though all others are.


           Russell McMahon

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2002\10\11@041055 by John Maud

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part 1 1233 bytes content-type:text/plain; x-avg-checked=avg-ok-3BC086; charset=us-ascii; format=flowed (unknown type 8bit not decoded)

Russell,

Any further developments on the ATtiny26 and STK500 issues?

I was following this thread with interest, as my samples arrive on Monday.

Regards
John


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part 2 131 bytes
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